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Physics 14 Online
OpenStudy (anonymous):

A 14-g coin slides upward on a surface that is inclined at an angle of 18* above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.35. Find the magnitude and direction of the force of friction (a.) when the coin is sliding and (b.) after it comes to rest.

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